'''
abs():计算绝对值
pow(x,y):返回x的y次方
round():返回五舍六入，留意不是四舍五入
'''

x =-10
print("以下输出abs()函数的应用")
print(x)
print(abs(x))

x = 5
y = 3
print("以下输出pow()函数的应用")
print(pow(x,y))

x = 48.4
print("以下输出round()函数的应用")
print(x)
print(round(x))

x = 48.5
print(x)
print(round(x))

x = 48.6
print(x)
print(round(x))